Ok... twins are not clones. They do not have identical genetic make-ups. Clones DO, and that is where the problems lie. As has already been pointed out, meiosis is missed out and there is no genetic variation. And you know what happens with in-breeding don't you? There will be no resistence to disease etc. We NEED mutation for survival. Look at Dolly the sheep - suspected advanced ageing and arthitis at a young age?

100 years from now, God only knows what will have happened to these people and their offspring. To say that cloning is ok is just plain ignorant.